The given expression is .

Method 1: Horizontally subtraction

   (Group the like terms)

         (Product of two same signs is positive)

Combine like terms using distributive property: ac bc = (a b)c.

Combine like terms using distributive property: ac + bc = (a + b)c.

                    (Subtract: 4 5 = 1)

                              (Add: 1 + 2 = 3)

Method 2: Vertically subtraction

The given terms are in descending order and like terms are aligned.

The solution is .